Compressor pump



H. W. DYER COMPRESSOR PUMP Jan. 6, 1931.

Original Filed March 25, 1928 2 Sheets-Sheet 1 INVENTOR.

I I I, S v ATRNEY.

Jan. 6, 1931. H. w. DYER COMPRESSOR PUMP Original Filed March 23, 1928 2 Sheets-Sheet 2 a w u E y? A UJIILW I N V EN TOR. w y mm A TORNE Y.

Patented as 6, 1931 UNITED STATES PATENT OFFICE mm: W. nm, or NEW YORK, N. Y.

I comrmson rum Original application flied March 24, 1928, Serial No. 264,488. Divided and this application filed October I r 16, 1929. Serial No. 400,102.

d March 24, 1928.

This invention relates to compressor pumps of a type commonly used in refrigerating systems and has for an object to provide a compressor with sleeve valves, a com pressor which is double acting and balanced in its action and a compressor which is comform of the compressor pump, Fig. 2, is a side .elevation, partly in section, corresponding with Fig. 1, Fig. 3, is a transverse sectional elevation of the compressor shown in Fig. 1 and Fig. lis a longitudinal sectional view of a modified form of compressor embodying my invention.

This compressor comprises a central driving shaft with a cylinder disposed on either side thereof having pistons connected to an eccentric on the shaft for reciprocating movement. The cylinders are composed of a length of tubing with suitable caps at the ends and with a transverse aperture to provide working space for the drive shaft and eccentrics. A valve sleeve surrounds the'cylinder and is operatively connected with the driving shaft by an eccentric to open and close the ports to the cylinder as the compressor is operated. This compressor is preferably mounted to operate in an oil bath so that the moving parts are thoroughly lubricated.

This application is a division from my copending application, Serial No. 264,488, filed In the drawings selected to show one form of the invention, the compressor-pump comprises the base 24 to which the cover 61 is secured on a gasket making a sealed construction. The pump cylinders are secured to the base by the flanges 62 and 63. The pump is double ended and symmetrical about the centre line of the shaft, corresponding parts being used in each end.

The cylinder proper comprises a tube 72 supported and aligned by the end caps and these caps are rigidly secured at 71 to the outer shell 64. The piston 65 operating in the tube 72has an extension 66 formed with a slot 67 in which the eccentric 68 on the shaft 69 operatively engages the piston.

A sleeve valve 73 is arranged to slide longitudinally on the cylinder tube 72 thereby providing a valve action for the pump. The,

eccentric 78 on shaft 69, Fig. 3, engages the eccentric rod 77 which connects to the stud 7 5 at 76. This stud moves in the slot 74 and is rigidly secured to sleeve 73 whereby the sleeve is reciprocated by the rotation of shaft The piston of the opposing cylinder is operated by eccentric 91 and the sleeve valve is operated by the eccentric 80, connecting rod 7 9 and stud 75. Sleeve bearings are provided for the shaft .69 as at 8182, and the bearing 81 is provided with holes 83 whereby oil can flow into the cylinders and keep the mechanism immersed in oil. The shaft 69 terminates in a coupling 84 for connecting to the motor shaft. An adjustable seal is provided at 85 to the shaft outlet.

In the position of the valve as shown in Fig. 1, an outlet is provided in the end walls of the cylinder at 86,- in alignment with the port 87. On the opposite side of the cylinder a corresponding aperture aligns'wi-thtlie port 89. In this position a port in the sleeve'valve 73 aligns with port 87 and the port 89 is prevent leakage of oil at closed. When the piston and sleeve move" to the opposite position the port 87 is closed and port'88 in the sleeve aligns with port.

89 establishing communication between'the pipe 90 and the cylinder. Pipe 90 connects with the pipe 36 as indicated in dotted outline in Fig. 3.

' It is apparent that as the piston moves inwards and creates a suction in the cylinder, the liquid or gas in pipe 36 is drawn into the cylinder through intake port 90 and 89. On the return of the piston port88 is closed, the material is compressed and at the end of the stroke the cylinder is opened through outlet port 87 thus discharging the material under pressure into the chamber d and to the pipe 27 to be circulated by the discharge from the compressor. v

It will be noted from Fig. 3, that the pump housing may be filled with oil up to the line, e when resting on base 24, which insures perfect lubrication and the space at above this line is occupied by the material discharged from the ports 87 in line with the outlet 27. The modified form of pump shown in Fig. 4, has certain parts identical with the pump described and similarly referenced. In this construction the eccentric rods for operating the sleeve valves are eliminated and instead the sleeve valve is continuous between the cylinders and operated directly by ec- The eccentric 104 operates in the slot in 105.

The sleeve 73 extends between the cylinders and slides with the movement of the pistons to control the parts to the cylinder as has been described. The pump mechanism. is 'supported in a frame 108 having ports 87 and 89 connecting with the cylinders.

Having t us described my invention, I claim:

1. In a compressor as described, the combination of a tube having caps on each end and a transverse aperture, a shaft with an eccentric operating in said aperture, a piston in each end of said tube connected with said' eccentric and a sleeve on the exterior of said tube operatively connected with said shaft to be slid over said tube and to open and close ports therein.

2. In a compressor, the combination of a tube *havingcaps on each end and a trans-' verse aperture, a sleeve sliding on said tube, and opening and closing ports therein, .an outer casing enclosing said sleeve and connecting said caps, an operating shaft mounted in said outer'casin and passing through the aperture in said tu e, an eccentric on said shaft, a piston in each end of said tube con nected with said eccentric and means operatively connecting said sleeve with said shaft.

3. In a compressor, the combination of a tube having caps on each end and a transverse aperture, a sleeve-sliding on said tube, and opening and closing ports therein, an outer casin necting sai caps, an operating shaft mounted in said outer casing and passing through the aperture in said tube, an eccentric on said shaft, a piston in each end of said tube connected with said eccentric and a second epcentrlc on said shaft arranged to slide said s eeve.

enclosing said sleeve and con- 4. In a compressor, the combination of an outer casing a pair of caps supported in alignment by said casing, a cylindrical tube having its ends closed by said caps and positioned by said caps, a sleeve sliding on said tube, and arranged to open and close ports in said tube, a piston in each end of said tube, a shaft operatively connected with said pistons mounted in said outer casing and an cccentric connecting said shaft with said sleeve.

5. In a compressor, the combination of a pair of cylinders in axial alignment having ports in their walls, an operating shaft mounted on the transverse center of said cylinders, an eccentric on said shaft, :1 piston in each cylinder connected with said eccentric, an outer sleeve on said cylinders arranged to open and close said ports and means operatively connecting said sleeve with said shaft.

6. In a compressor, the combination of a tube having a cap on its outer end, a sleeve sliding on said tube and opening and closing portstherein, an outer casing enclosing said sleeve and holding said cap in place, an

operating shaft mounted in said outer casing, an eccentric on said shaft, a piston in said tube connected with said eccentric and means operatively connecting said sleeve with said shaft In testimony whereof I afiix my signature.

HARRY W. DYER. 

